Carline for car-roofs.



'V. E. SISSON. OARLINB FOR GAR Roars.

APPLICATION FILED JULY 1 1912 Patented July 8, 1913.

vm'ron n. SISSON, OF CHICAGO, ILLINOIS.

(EZARLINE FOR GAR-BODIES.

I Specification of Letters Patent.

Patented July 8, 1913.

Apiilication and July 15, 1912. Serial No. 709,515.

To all whom it may concern Be it known that I, VINTON E. SIssoN, a citizen of the United States, residing at Chicago, in the,county of Cook and State of Illinois, have invented'fcfitain new and useful Improvements in Carlines for Car-Roofs, of which the following is a specification.

My invention relates to a carlineifor the roofs of railway cars, particularly box; cars, and the principal object of the invention is to provide a metal'carlinc which, by its design and construction, will be very rigid and strong to withstand the peculiar stresses developed in the roof of a car when the car is in service, and which, furthermore, will economize metal so far as possible so that the weight of the carline and its cost of manufacture will be reduced to a minimum.

The cal-lines supporting the roof of a railway car are subjected, when the car is in service, to a number of stresses which vary in character and differ in intensity at dill'erentparts of the roof. The vertical stresses, due to the weight of the roof, are greatest at the center of the car and diminish toward the sides. The carlines are also subjected to a transverse thrust, when the car starts or stops, due to the inertia of the roof. This stress is also greatest along the center line of the car. In addition'tlie carline and its attachments to the side walls of the car are subjected, when the car is in motion, and particularly if the track is rough, to transverse stresses due to What is known as Weaving which are greatest at the sides of-the car. It is these stresses which tend to distort or twist the car body out of its rectan ular form. The weaving of the car also tours 'to give the carline torsional strains particularly if the attachments of the carline to the side walls of the car are spread with the intent to ch'eck the tendency of the car structure to be distorted from its rec tangular form. The twisting stresses are,

is well calculated to resist all of these .va-

ridusstresses; and pressures;

The ihventionis shown 111 a preferred em bodiment in the accompanying drawings, wherein Figure 1 is a plan view of the carline showing its attachment to the side plates of a box'car; Fig. 2, a side elevation of the same showing the side plates, purlins and ridge pole in section, and Figs. 3 and 4, sec tional views taken on lines 33 and 4-4, respectively, of Fig. 1.

Like characters of referenpe designate like parts in the several figures of the drawing.

Referring to the drawing, the carline consists of two members A, A, which are preferably pressed steel shapes in the form of channels. That is, each member is made up of an upper horizontalfiflatige 10, a. vertical web 11, and a lower horizontal flange 12. The channel members A are disposed with their open sides facing each other and with their upper horizontal flanges 10 secured together in any suitable manner, for example, by the rivets 13. The members A are bent at points preferably just beyond the rivets 13 so that the carhne consists of a central portion which extends at right angles to the sides of the car and on each side of the central portion a pair of oblique or spread legs which are secured to the side plates 15 of the car frame. To make this attachment to the side plates secure the extremities of the vertical webs 11 are bent out so as to form flanges 14. These flanges are secured to the side plate by bolts 16. The

extremities of the upper horizontal flanges 10 may be bolted to the side plates by the bolts 17.

The members A constituting the cal-lines are preferably pressed from ordinary sheet metal. In order to give a proper slope to the roof and to take care of the roof load which is greatest at the center of the car, the vertical webs 11 arewidest at the center of the car and taper down toward the side plates. The transverse stresses due to weaving are greatest at the sides of the car and these stresses are resisted by the spreading of the le s of the carline and preferably also by making the horizontal flanges 1O wider at the ends of the carline than at the middle. In other words, the surplus metal. obtained by narrowing-the vertical to advance, ahead of the other.

g roeaeee webs toward thesides of the car is utilized toincrease the width of the horizontal flanges which, in view of the peculiar stresses to which a carline is subjected,

should be stronger at the sides of the car than at the middle. In addition, this feature of my construction enables me to make each member of the carline out of a rec tangular strip of metal without the necessity for shearing the metal.

It will be observed that the center portion of the carline has what may be termed a box construction, that is, the vertical webs 11 are spaced away from each other'so that the neutral aXis of the carline lies midway bet-ween these webs. This construction gives the carline great capacity for resisting the inertia thrusts of the roof when the car starts and stops; and it also resists the torsional strains on the carline which are exerted when the car weaves. When abox car weaves one side wall advances, or tends In addition, one end of each sidewall tends to sag L below or project above the other end. In

other words, the whole body or box structure of the car has a tendency to become deformed from its normal shape which is that of a rectangular prism. This and the tendency of the car body to sag in the middle subjects the carlines or some of them to twistingstrains which are enhanced if the spread of a carline onthe side plate is 0011- siderable. It will be understood that while these various deformations may not be appreciable in a newly constructed car there are always forces at work, when the car is in service, tending to-produce them. After the car has been in use for some time its whole structure is loosened due to vibration, wear, shrinking of the wood, and other causes, so that it becomes less able to resist the stresses tending to deform it.

The purpose of my invention, as will be apparent from the foregoing, is to provide a carline which, by its peculiar construction,

will have the capacity to resist all of the various forces which are exerted against the upper part of a box car when in service and tend to destroy the rigidity of its con-' struction and so shorten the life of the car.

As. shown in the drawings, the ridge pole l9 and the purlins may be bolted, or otherwise secured, to the upper horizontal gafi anges 10 of the carline.

I claim:

1. A carline consisting of two channel members arranged with their open sides facing each other, attached together at the middle and diverging one" from the other at opposite sidesofthe place of. attachment, the vertical dimensions of said members being greatest at the middle of the carline and diminishing toward the extremities thereof, and the width of whichasgreatest at the ends of the carline and diminishes toward the middle.

2. Acarline consisting of two members zontal web, the horizontal webs of said memthe carline, with the vertical webs spaced apart, the longitudinal webs being provided with projections bearing against the side plates of the car and the extremities of the to be secured to said side plates, said members diverging one from the other at opattached one to the other.

-3. A carline consisting of two members each comprising a vertical web which is widest at the middle and diminishes in which is widest at the ends and diminishes in width toward-the middle, said members being arranged so that the vertical webs thereof arespaced one from the other and with the horizontal webs secured together at the middle of the carline, said members diverging one from the other at opposite sides of the place at which they are attached one to the other.

projections adapted to bear upon the upper surfaces of the side plates of the car.

members arranged with' their open sides facing each other and with one pair of horL zontal flanges secured together at the middle, said members diverging one from anthey are attached together, the extremities of the vertical webs of said members being bent out-ward from the carline so as to provide attaching flanges adapted to bear against the inner surfaces of the side plates 5f the car, and one pair of horizontal flanges of said members being formed with projections adapted to bear against the side plates of the car. v

6. A carline consisting of two members each comprising a vertical web which is widest at the middle and diminishes in width toward the ends, and 'a'horizontal web which each comprising a vertical web anda hori-' bers being secured together at the middle of vertical webs being bent-outwardly so as posite sides of the place atwvhich they are width toward the ends, and a horizontal web 5. A carline consisting of two channel other at opposite sides of the place at which- 4. A carline consisting of two channel flanges of said members being formed with AS Widest at the end and diminishes toward be secured to said side plates, said members the'middle,-tl1e horizontal Webs of said memdiverging one from the other at opposite 10 hers being secured together at the middle of sides of the place at which they are'attached the carline, with the vertical webs spaced one to the other.

5 apart, the horizontal webs being provided VINTON E. SISSON.

with projections bearing against the side Witnesses: plates of the car and the extremities of the L. A. FALKENBERG, vertical webs being bent outwardly so as to G. Y. SKmNmR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Yatents, Washington, D. C. 

